Kesarin Chaichalermpol (born on May 12, 1979 in Thailand) is a Thai actress who has acted under a number of stage names, particularly Nong Natt and Natt Chanapa. (น้องแนท) Her particular infamy surrounds pornographic videos released outside Thailand and brought into the mainland. These videos led to her arrest and prosecution by the Thai government. The video featured her in an appearance in a hardcore porn movie with a Japanese man (making such movie is illegal in Thailand).

It is reveal that modeling and advertising companies, magazines and television programs have been offering her six-digit sums for modeling work since the accusation made media headlines. She eventually had to pay a fine, received a suspended 6-month sentence, and probation for a year.

Harsh punishment was nonexistent due to her popularity and lack of public outcry concerning the matter. In 2007, her sex video spread in the Philippines via the internet and cellphone videos. Natt Chanapa as she is known in the Philippines has a very close resemblance to Angel Locsin, a leading showbiz actress and endorser in the Philippines. Despite having a 'sexy' image, Locsin is not an adult actress. It was later proven that the woman in the video was indeed Chanapa.